Method and apparatus for simultaneously receiving on two...

H - Electricity – 04 – W

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H04W 52/02 (2009.01)

Patent

CA 2722488

A method and an apparatus for simultaneously receiving on two carriers and performing discontinuous transmis-sion (DTX) and discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA) are disclosed. A wireless transmit/receive unit (WTRU) receives a message for activating DRX for at least one of an anchor carrier and a supple-mentary carrier and applies the same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the mes-sage. The message may be received via a high speed shared control channel (HS-SCCH) order. The WTRU may activate or de-ac-tivate the supplementary carrier based on the physical layer signal. Upon activation of the supplementary carrier, the WTRU may apply the same DRX pattern on both the anchor carrier and the supplementary carrier. The WTRU may flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de- activation of the supplementary carrier.

Cette invention se rapporte à un procédé et à un appareil pour recevoir simultanément sur deux porteuses et exécuter une émission discontinue (DTX) et une réception discontinue (DRX) dans un accès de paquet de liaison descendante à grande vitesse à deux cellules (DC-HSDPA). Une unité d'émission/réception sans fil (WTRU) reçoit un message destiné à activer une DRX pour une porteuse d'ancrage et/ou une porteuse supplémentaire et applique le même motif DRX à la porteuse d'ancrage et à la porteuse supplémentaire lors de la réception du message. Le message peut être reçu par l'intermédiaire d'une instruction de canal de commande partagé à grande vitesse (HS-SCCH). La WTRU peut activer ou désactiver la porteuse supplémentaire sur le signal de couche physique. Lors de l'activation de la porteuse supplémentaire, la WTRU peut appliquer le même motif DRX sur la porteuse d'ancrage et sur la porteuse supplémentaire. La WTRU peut vider un tampon de demande de répétition automatique hybride (HARQ) associé à la porteuse supplémentaire lors de la désactivation de la porteuse supplémentaire.

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